friday president obama spoke at a chicago high school. hours later a freshman at the school destiny warren found out her 18-year-old sister was killed by a single gun shot wound to the head. >>> new information about the meteor that exploded on friday. nasa says the meteor was bigger than originally thought. they say the fire ball was 55 feet wide and weighed about 10,000 tons. it was traveling at 40,000 miles per hour when it exploded over siberia. >>> and another milestone for michael jordan. the basketball legend turns 50 today. happy birthday, m.j. >>> that was the pope this morning speaking from his window at the vatican while thousands of people gathered at st. peteers square. this is the pope's second to last sunday before retirement. the pope announced last week he is stepping down by the end of the month. anne thompson with more ont that. >> reporter: more than 50,000 people came to hear the pope. that is double the size of last week's crowd. he spoke to them in six different languages thanking them for their prayers and support